Parasympathetic system) sacral component: where are the ganglia located?

In the walls of target organs

Parasympathetic NS: pre and post ganglionic fibers (2)

-long pre gang fibers to ganglion near of in the organ wall

-short post gang fibers

Sympathetic NS: Pre v Post gang fibers (2)

-short preganglionic fibers to chain ganglia close to vertebral column

-long post gang fibers

Sympathetic post gang fibers) adrenal medullary acts as

Post gang cells and release E/ne into the blood vascular system for a slower acting response that last longer

Post gang/neurons =

Initial fast response

Post gang/medullary cells =

Slow prolonged response

*allows us to keep running and running from the bear

Thoraco-lumbar system

Sympathetic system

sympathetic system) where are the pre gang neurons located in the S.C?

Lateral horn of thoracic and upper lumbar

paravertebral ganglia?

Sympathetic chain

Around how Manny pairs are there of paravertebral ganglia?

23-25

What connects the sympathetic trunk ganglion?

Sympathetic trunk

3 pathways of sympathetic innervation

-synapse at the same elvel

-synapse at a higher or lower level

-synapse in a distant collateral ganglion anterior to the vertebral column

Synapse at the same level pathway description

-pre gang begins at the lateral horn which sends axons out through ventral root to join ventral ramus of spinal nerve. ventral ramus gives off a white ramus communicans which enters at the sympathetic trunk ganglion at its associated level in order to synapse at the same level with post gang neuron. An unmyelinated post gang neuron exists at this level (gray ramus communicans) to travel long distance to intended target organ